`1` haven't worked

`2` have bought

`3` haven't planned (dấu hiệu : yet)

`4` have you been

`5` has written

`6` hasn't seen (dấu hiệu : for a long time)

`7` Have you been

`8` hasn't started

`9` Has she spoken

`10` hasn't had (dấu hiệu : yet)

`11` has sent

`12` have visited

`13` have been

`14` has - packed (dấu hiệu : already)

`15` has had

`16` have done

`17` have - clean (dấu hiệu : just)

`18` has painted

`19` have gone

`20` has given up (give up : từ bỏ)

- Thì Hiện Tại Hoàn Thành (Present Perfect)

* Cấu trúc:

+) S + has/have + Vpp + O 

-) S + has/have + not + Vpp + O (has not = hasn't , haven not = haven't)

?) Has/have + S + Vpp + O ? 

* Chú ý : 

- I/we/you/they/N số nhiều đi với have

- He/she/it/N số ít đi với has

* Dấu hiệu : never , ever , for + khoảng thời gian , since + mốc thời gian , yet , just , before , so far , already , lately , recently , many times , up to now , ... 

`-` I/we/you/they/N `+` have

`-` He/she/it/N `+` has

Dấu hiệu nhận biết `:` never , ever , for `+` khoảng thời gian, since `+` mốc thời gian, yet, just, before, so far, already, lately, recently, many times, up to now.

Đáp án:

`1`. haven't worked.

`2`. have bought.

`3`. haven't planned.

`4`. have you been.

`5`. has written.

`6`. hasn't seen.

`7`. Have you been.

`8`. hasn't started.

`9`. Has she spoken.

`10`. hasn't had.

`11`. has sent.

`12`. have visited.

`13`. have been.

`14`. has - packed.

`15`. has had.

`16`. have done.

`17`. have `-` clean.

`18`. has painted.

`19`. have gone.

`20`. has given up.

`@`BountyHunter